Excited neutrinos decaying into a neutrino and a photon are searched for in the ALEPH detector at LEP. No evidence is found for Z decay into nu nu* or nu* nu* final states. Upper limits are derived on excited neutrino couplings up to excited neutrino masses close to the Z mass. Lower limits on the nu* mass, independent of the nu* decay modes, are deduced from the total Z width.
Search for excited neutrinos in Z decay
G. Batignani;CIOCCI, MARIA AGNESE;FERRANTE, ISIDORO;FIDECARO, FRANCESCO;FORTI, FRANCESCO;MESSINEO, ALBERTO MARIA;TONELLI, GUIDO EMILIO;G. Triggiani;
1990-01-01
Abstract
Excited neutrinos decaying into a neutrino and a photon are searched for in the ALEPH detector at LEP. No evidence is found for Z decay into nu nu* or nu* nu* final states. Upper limits are derived on excited neutrino couplings up to excited neutrino masses close to the Z mass. Lower limits on the nu* mass, independent of the nu* decay modes, are deduced from the total Z width.File in questo prodotto:
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